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Luminescent material, application thereof and organic electroluminescent device containing luminescent material

An unreplaced and independent technology, applied in the direction of luminescent materials, electric solid-state devices, organic chemistry, etc., can solve the problems of unresolved lifespan of blue light materials, decline in efficiency and color purity, difficulty in completeness, etc.

Inactive Publication Date: 2021-12-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the selection of OLED materials, singlet light-emitting fluorescent materials have a long life and low price, but low efficiency; triplet light-emitting phosphorescent materials have high efficiency, but are expensive, and the life of blue light materials has not been solved.
However, due to the relatively planar structural characteristics of MR dyes, it is extremely prone to molecular aggregation, which leads to a sharp broadening of the spectrum and a sharp drop in luminous efficiency.
Usually, the doping concentration corresponding to the optimal device performance of this type of material is often less than 1wt%, and is limited by the small Stokes shift of narrow-spectrum dyes. Brings a decline in efficiency and color purity, so the evaporation window is very narrow and the process requirements are very complicated

Method used

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  • Luminescent material, application thereof and organic electroluminescent device containing luminescent material
  • Luminescent material, application thereof and organic electroluminescent device containing luminescent material
  • Luminescent material, application thereof and organic electroluminescent device containing luminescent material

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preparation example Construction

[0194] Specifically, the preparation method of the organic electroluminescent device of the present invention comprises the following steps:

[0195] 1. Ultrasonically treat the glass plate coated with the anode material in a commercial cleaning agent, rinse in deionized water, ultrasonically degrease in acetone: ethanol mixed solvent, bake in a clean environment until the water is completely removed, and use ultraviolet light Light and ozone cleaning, and bombardment of the surface with a beam of low-energy cations;

[0196] 2. Put the above-mentioned glass plate with anode in the vacuum chamber, and evacuate to 1×10 -5 ~9×10 -3 Pa, vacuum evaporating a hole injection material on the anode layer film to form a hole injection layer, and the evaporation rate is 0.1-0.5nm / s;

[0197] 3. Vacuum evaporate the hole transport material on the hole injection layer to form the hole transport layer, the evaporation rate is 0.1-0.5nm / s,

[0198] 4. On the hole transport layer, the ele...

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Abstract

The invention relates to the technical field of organic electroluminescence, and especially relates to an organic compound, application thereof, and an organic electroluminescence device containing the organic compound. The compound has a structure represented by formula (1) or formula (2) shown in the description. An aromatic ring or a heteroaromatic ring with a specific carbon atom number is used as a large-steric-hindrance protecting group to inhibit interaction between planar boron-containing / nitride-containing molecules, so that the compound has the advantages of narrow half-peak width, high fluorescence quantum yield, high fluorescence intensity and the like. Meanwhile, the glass transition temperature, the molecular thermal stability and the anti-aggregation quenching effect are high. The compound provided by the invention can be used as a luminescent layer doping material of an organic electroluminescent device, and can improve the luminescent color purity and prolong the service life of the device.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to an organic compound and its application and an organic electroluminescent device containing the compound. Background technique [0002] Organic electroluminescent devices (OLED: Organic Light Emission Diodes) are a type of device with a sandwich-like structure, including positive and negative electrode film layers and an organic functional material layer sandwiched between the electrode film layers. Due to the advantages of high brightness, fast response, wide viewing angle, simple process, and flexibility, OLED devices have attracted much attention in the field of new display technology and new lighting technology. At present, this technology has been widely used in the display panels of new lighting fixtures, smart phones and tablet computers, and will further expand to the application field of large-size display products such as TVs. It is a new type of dis...

Claims

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Application Information

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IPC IPC(8): C07F5/02C07F7/08C07D471/06C07D519/00C07B59/00C09K11/06H01L51/50H01L51/54
CPCC07F5/02C07F7/0814C07D471/06C07D519/00C07B59/002C09K11/06C09K2211/1011C09K2211/1014C09K2211/1022C09K2211/1029C09K2211/104C09K2211/1044C09K2211/1055C09K2211/1059C09K2211/1096C07B2200/05Y02P20/55
Inventor 张跃威段炼张东东洪响晨李国孟
Owner TSINGHUA UNIV
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